Method of making brick.



0. H. FROST. METHOD OF MAKING BRICK.

APPLICATION FILED JAN.27, 1908.

Patented Jan. 16, 1912.

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CHARLES H. FROST, OF PASADENA, CALIFORNIA.

METHOD OF MAKING BRICK.

Specification of Letters Patent.

Patented Jan. 16,1912.

Application filed January 27, 1908. Serial No. 412,949.

I'o'cll whom it may concern:

Be it known that I, CHAnLus H. lfnos'r, a citizen of the United States, residlng at i Pasadena, in the county of Los Angeles and State of California, have invented a new and useful Method of Making Brick, of

which the 'following is a specification.

This invention relates to a method of producmg a brick designed especially for paving, and the objects of the invention are v raised letters on pressed brick by repressing it 'has only been possible with such construction toget the cement a very short way the body of the brick, except at points where lettering is to appear, but it is impossible to repress a pressed brick to an extent suflicient to produce projections of any appreciable height. -The best results secured have only produced such slightly raised projections that they do not form cracks between the bricks which will permitthe cement to enter and flow to the bottom,"and

down fromthe top.

The present 1nvent1on consists of a method of producing a pressed brick which is provided with projections of an appre-' ciable height, which projections form stable 'abutments for the adjoinlng brick to be a ainst and )roduee a crack of the desired -thiekness between two bricks, and .the

nrethod, in fact, enables the projections to be formed of anydesired height, and. so far as I am aware, no pressed method of pro- ,diicing a brick provided with such projections of appreciable height, has heretotorc been known.

It should be borne in mind that the height of the pro ections is a necessary feature to enablethe cement to work down to the bot tom and fully fill the cracks between the desired interlocking bricks and cause the etfcct,

i The accompanying drawings show my novel form of brick "and illustrate the .method of producing'same, and referring thereto :,Figure 1 perspective view of the brick. Fig. 2'1s -a plan view of a portion of pavement constructed with the brick. Fig. 3 is a sectional view on line a; w Fig. 2. Fig. 4 is a face view of the die of one form of press from which the bar issues and which produces the desired'cross sectional contour ofthe brick. Fig. 5 is a side elevation of the bar issuing from such a press, and illustrates one device for indent-- ing theribs on the side or face of the brick to produce the recesses in the ribs.

The brick consists of 'a body 1, having a plurality of projections 2 upon one or. both of its sides, or faces, These projections are preferably arranged in rows or series which extend from end to end of thebrick but are at a distance from its edges. They can be arranged opposite each other in the different rows or so as to alternate with each other, as'will be readily understood, but I have only shown two rows of projections in the drawings with the projections in aline- 'ment with each otheror transversely of the brick. The projections may also be of any suitable size and shape but they are preferably made of aniappreciable height, and semi-cylindrical in cross section, that is, with curved exterior, or outer wall, and with straight, parallel end walls. By appreciable height I means that when the bricks are placed upon their edges, as side by side to form a pavement, they will be held at such a distance from each other by the projections of one brick engaging with the side of an adjacent brick, a crack or space will be formed between said bricks to permit of the cement, grout, pitch &c., that is poured between them flowing or passing to the bottom of the bricks and thereby making a substantially solid structure without cracks or cavities in which water can find a lodgment to detract trom or destroy the eiliciency and solidity of the mass.

I am aware that e'll'orts have been made to t'orm projections upon bricks by repressing the brick so as to form letters, as the name of the maker,thereon. but, owing to the substantially incompressible nature of a pressed brick, the letters while sutliciently readable are of such a slight height as to be substantially inappreciable so far as any mechanical function is concerned. Furthermore, the

.spaces formed by the irregular shapes of the letters rendered many of them inaccessible to the cement, or filler, and thereby detracts from the efiiciency of-such constructions of the ribs that form the projections,

thereby securing homogeneity of structure and uniformity of pressure in the brick and projections.

The portions of the ribs between the projections are then indented or ressed downinto the body of the brick to form recesses, or spaces 7, many suitable manner, preferably by means of-a rotating wheel 8 provided with ribs or projections 9. In this manner the recesses, or spaces, can be rapidly formed in the ribs as soon-as the bar comes from the press and before it has been permitted to dry, or become hardened in the least, by exposure to the air, thus permitting changing o'rafi'ecting the density ortexture of the bar. i

Having described my inve11tion,-I claim 1. The hereindescribed method of producing abrick, which consists in forming a body portion with one or more ribs on its face and then forming recesses in said ribs by indenting said ribs.

2-. The herein described method of producing a brick, which consists in forming a body portion with ribs projecting an appreciable distance from ,its face and then compressing portions of the ribs to form recesses therein without further appreciably compressing said body portion.

In testimony whereof, I have hereunto set my hand at Los Angeles, California, this 18th day of January, 1908.

CHARLES H. FROST. In presen'ce ofe v GEORGE T. I'IACKLEY, FRANK L. A. GRAHAM. 

